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144 lines
4.7 KiB
C++
144 lines
4.7 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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// Copyright (C) 2009 Ricard Marxer <email@ricardmarxer.com>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#include "main.h"
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#include <iostream>
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using namespace std;
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template<typename MatrixType> void reverse(const MatrixType& m)
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{
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typedef typename MatrixType::Index Index;
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typedef typename MatrixType::Scalar Scalar;
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typedef Matrix<Scalar, MatrixType::RowsAtCompileTime, 1> VectorType;
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Index rows = m.rows();
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Index cols = m.cols();
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// this test relies a lot on Random.h, and there's not much more that we can do
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// to test it, hence I consider that we will have tested Random.h
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MatrixType m1 = MatrixType::Random(rows, cols);
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VectorType v1 = VectorType::Random(rows);
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MatrixType m1_r = m1.reverse();
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// Verify that MatrixBase::reverse() works
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_r(i, j), m1(rows - 1 - i, cols - 1 - j));
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}
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}
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Reverse<MatrixType> m1_rd(m1);
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// Verify that a Reverse default (in both directions) of an expression works
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_rd(i, j), m1(rows - 1 - i, cols - 1 - j));
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}
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}
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Reverse<MatrixType, BothDirections> m1_rb(m1);
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// Verify that a Reverse in both directions of an expression works
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_rb(i, j), m1(rows - 1 - i, cols - 1 - j));
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}
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}
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Reverse<MatrixType, Vertical> m1_rv(m1);
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// Verify that a Reverse in the vertical directions of an expression works
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_rv(i, j), m1(rows - 1 - i, j));
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}
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}
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Reverse<MatrixType, Horizontal> m1_rh(m1);
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// Verify that a Reverse in the horizontal directions of an expression works
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_rh(i, j), m1(i, cols - 1 - j));
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}
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}
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VectorType v1_r = v1.reverse();
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// Verify that a VectorType::reverse() of an expression works
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for ( int i = 0; i < rows; i++ ) {
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VERIFY_IS_APPROX(v1_r(i), v1(rows - 1 - i));
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}
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MatrixType m1_cr = m1.colwise().reverse();
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// Verify that PartialRedux::reverse() works (for colwise())
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_cr(i, j), m1(rows - 1 - i, j));
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}
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}
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MatrixType m1_rr = m1.rowwise().reverse();
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// Verify that PartialRedux::reverse() works (for rowwise())
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for ( int i = 0; i < rows; i++ ) {
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for ( int j = 0; j < cols; j++ ) {
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VERIFY_IS_APPROX(m1_rr(i, j), m1(i, cols - 1 - j));
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}
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}
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Scalar x = ei_random<Scalar>();
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Index r = ei_random<Index>(0, rows-1),
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c = ei_random<Index>(0, cols-1);
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m1.reverse()(r, c) = x;
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VERIFY_IS_APPROX(x, m1(rows - 1 - r, cols - 1 - c));
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/*
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m1.colwise().reverse()(r, c) = x;
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VERIFY_IS_APPROX(x, m1(rows - 1 - r, c));
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m1.rowwise().reverse()(r, c) = x;
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VERIFY_IS_APPROX(x, m1(r, cols - 1 - c));
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*/
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}
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void test_array_reverse()
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{
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for(int i = 0; i < g_repeat; i++) {
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CALL_SUBTEST_1( reverse(Matrix<float, 1, 1>()) );
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CALL_SUBTEST_2( reverse(Matrix2f()) );
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CALL_SUBTEST_3( reverse(Matrix4f()) );
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CALL_SUBTEST_4( reverse(Matrix4d()) );
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CALL_SUBTEST_5( reverse(MatrixXcf(3, 3)) );
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CALL_SUBTEST_6( reverse(MatrixXi(6, 3)) );
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CALL_SUBTEST_7( reverse(MatrixXcd(20, 20)) );
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CALL_SUBTEST_8( reverse(Matrix<float, 100, 100>()) );
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CALL_SUBTEST_9( reverse(Matrix<float,Dynamic,Dynamic,RowMajor>(6,3)) );
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}
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#ifdef EIGEN_TEST_PART_3
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Vector4f x; x << 1, 2, 3, 4;
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Vector4f y; y << 4, 3, 2, 1;
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VERIFY(x.reverse()[1] == 3);
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VERIFY(x.reverse() == y);
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#endif
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}
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